The region is underlain by the Mesozoic and/or Paleozoic Wark Gneiss and greenstone of the Lower Jurassic Bonanza Group. A discontinuous carbonate horizon extends along a northwest trend and is thought to be correlative with the Upper Triassic Quatsino Formation, Vancouver Group. The Wark Gneiss comprises mainly massive and gneissic metadiorite, metagabbro and amphibolite and is possibly the metamorphic equivalent of a mafic unit of either the Paleozoic Sicker Group or the Upper Triassic Karmutsen Formation (Vancouver Group); the latest metamorphism took place in the Jurassic.

A shaft has been sunk for about 6 metres on an outcrop of magnetite containing minor chalcopyrite. On the adjacent Willoron showings (092B 056) magnetite ore occurs mainly in the limestone band at or near contacts of greenstone or dioritized greenstone. Skarn minerals in the area are reported to be garnet, epidote and diopside.